As of 2026, which of the following is the essential element for the batteries used in most electric cars?
Question and options
As of 2026, which of the following is the essential element for the batteries used in most electric cars?
- Magnesium
- Lithium
- Sodium
- Bromine
Answer and explanation
Correct answer: B - Lithium
Most electric cars run on lithium-ion batteries, in which lithium ions move between the electrodes as the battery charges and discharges. Sodium-ion batteries exist but are used in only a small share of cars, and magnesium and bromine are not the basis of today's car batteries.
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